Vehicle lamp



May 14, 1929. H. L. wlLsoN 1.713.110

VEHICLE LAMP Filed July 9, 192s zisnee-s-'sneqt 1 L' amata 4' May 14, 1929. H. L. wlLsoN 1,713,110

VEHICLE LAMP Filed July 9, 1923 2 Sheets-Sheet' 2 arman g Patented May 14, 1929.

UNITED 5.*11Arias PATENroFFIcE.

HERBERT L. WILSON, OF TOLEDO, OHIO, ASSlIG-LTOR,J BYYMESNE .AS'SIGNMENTVTO THE DURA COMPANY, OF TOLEDO, OHIO, A

VEHICLE LAMP.

' Application filed Julyk 9, 1923. Serial No. 650,453. n

This invention relates to vehicle lamps and particularly relates to lamps for interior use in vehicles of the closed body type.

The invention consists in a novel provision for quick detachably securing the glass lens or dome to a support for thelamp VIn the drawings v Figure 1 is a view of the improved lamp constructionl in side elevation; j Y

Figure 2 is a cross section on line 2-2 of Figure 1;

Figures 3 and 4 are perspective views relatively of the reflector forming bulb support and base of the lamp and of the removable unit including the cover glass;

Figure 5 is a fragmentary enlarged view of a bayonet joint slot formed in one of the parts; y o

Figure 6 is a cross section on line 6 6- of Figure 5.

lamp to the top frame 5 of the vehicle. The

reflector or back plate 1 'is formed with an opening 5 in which is mounted the lamp socket 6 in such a manner as tolocate the bulb 6 engaging said socket in the axial' line of the dished reflector. 7 designates the lens or cover glass and S an annular sheet metal retainer for said glass. The glass 7 is dished oppositely to the curvature ofthe reflector 1 and the ring 8 has a curvature conforming to that of said glass. To hold. the glass 7 fixed in its proper central position in the retainer 8, there is employed a ring comprising` the cylindrical wall 9 and the outwardly projecting flange The ring 9. 10 is interiorly detachably engaged with the retainer 8 and tongues 14- integral with the wall 9 at its upper edge arev bent to project downwardly to marginally bear upon the glass 7 and hold the same against the retainer 8. As a preferred means for detachf ably engaging the ring 9, 10 with said retainer, the latter is formed at suitable spaced points with inwardly projectingor radial ugs 11 and corresponding marginal slots or notches 12 are formed in theportion 10 of said ring. After registering thenotches 12 with the lugs 11 the ring 9, 10A is moved toward the retainer 8- so as to seat the tongues 14 upon the glass 7. The ring 9, 10'

is then slightly rotated so as to engage the lugs 11 above the flange 10 of said ring. Preferably, pockets 13 are formed in said flange respectively adjacentl the notches`12, the lugs 11 being sprunginto said pockets. Thus, it is seen that theglass 7, its retainer 8 andthe ring 9, 10 are adapted to form a unit, the'parts of which are held firmly together. The portion 9 of the ring 9, 10 provides for mounting this unit upon therellecting back plate l. Thus, saidportion 9 is formed with diametrically opposed indented bayonet joint grooves 15 and a pair of corresponding bosses 16 are indented'in the cylindrical `vvall 2 of the member 1. Thus, by registering the grooves 15 with the bosses 16, the ring member 9 may be inserted into the cylindrical wall 2 ofthe back plate and a slight rotation of the unit 7, 8, 9, 10 then engages said bosses in the circumferential portions of'said grooves. 'Preferably, the circumferential` portions ofy jointgrooves 15 are slightly less jacent the entrance portion of said grooves, as is best indicated at 15"L in Figure 5, so that in completing assembly the bosses 16 Will snap into the relatively deep ond portions of said grooves and a predetermined resistance to circumferential. turning of the removable unit portion of the lamp will be offered by the portions 15a of' the grooves.

The described constrluztion provides for a rapid assembly both of the cover glass .or lens in its-retainer ring and of the unit comprising Vsaid lglassr and ring with the reflecting back plate. A time economizing feature of the construction is thecomplete absence of any soldered joints or connections. A further economical feature lies in the use of pressed, stamped, or spun sheet metal for all metallic parts. It is to be observed that all of the 'assembled parts of the lamp are the bayonet` shallow adconnected undera stress that will serve to 4stress holding them in the pockets 13 and resisting relative movement-of the retainer S and the ring 9, 10 and the bosses 16 fit vsnuglyfin lthe bayonet joint slots 15, resisting relative movement.

What l-clairn as iny invention is z-f l. A lanip comprising a base having provision for mounting a source Vot light, a cover glass coacting with said base to torni a container `'for said source of light, an annular retainer for said glass, and a ring 4detachably engageable with said base and dctachably securing said retainer to said base. V

2. A lamp as set forth `in clailn l,-said base having a cylindrical marginal wall, and said ring having a portion telescopical ly engaged with said wall.

25. A lanip as set forth in claiin .1, said base and ring` having.telescopically engaged parts,-and the ring having tongues pro jecting -toward the glass andy marginally bearing thereupon.

4. A lanip as set forth in claim l, said ring rotatively interlocking with said retainer and being adapted to rotatively interloclr with said supporting base. f

A lainp as set forth in claim Al, said basevhaving a substantially annular Yiiange for engagement by fasteners, and said ring having an outwardly projecting 'flange fitw ting within the retainer. and interlocking with the latter and seating' against said flange of the base in the assembled structure.

6. A lainp as set forth in claim l, said base havin a substantially cylindrical naar ginal wall, and said ring comprising a cylindrical Wall telescopically engaging said Amarginal wall and having integral tongues 'to bear upon the glass,'sa1d ring further comprising anoutwardly projecting portion adapted for interlocking with said retainer. y

' 7. A lanip as set forth in claim l, said base comprising a dished central portion having an interior rei'lecting face, a substantially cylindrical marginal portion Yand a flange outwardly projecting from said niarginal portion, said fla-nge Vproviding for attachment of the base to a suitable support, said ring comprising a wall telescopically engaging within the cylindrical portion of the base and further comprising an outwardly projecting tlanges, 'tongues integral with one of said portions, bent to engage the glass to hold the saine centrally in its retainer, the latter having lugsV projecting radially` inward for interlocking with the outwardly projecting iiange of said ring.

8. In a lamp, a base iorincd ont pressed sheetinetaha cover glass, a retainer 'for said glass formedot pressed sheet metal, a

pressed metal ring, means on said ringl engaging said glass, cooperating means on said retainer and ring tor securing said parts together and cooperating means on said base and ring for securing the latter to the former, said three last-mentioned means being under stress in the assembled position of the parts.

9. A lamp comprising a base having provision for mounting aY source of light, a cover glass coacting with said base to torni a container for said source of light, an annular rretainer' tor said glass, and a ring devtachably supporting said glass in said retainer and vtorrning with said retainer and glass, a unit detachable as such ironi said base.

In testimony whereof I ailix mysignature.

` HERBERT L. VLSON. 

